The apartment itself is fine. It has a comfortable bed. The building is new and has a luxury touch. During my stay there were issues with the bathroom drain and it smelled very putrid. It was making me nauseous and I tried to stay out as much as possible. Finally, I asked to cut my stay in half and the owner approved it.
While the building is next to a large park, it is also right next to a very busy main road and train tracks so there is traffic noise but it is pretty typical for Bangkok.